The best quality and taste from your iSi cream whipper, use iSi 070299 Professional N2O cream chargers. These cream chargers are made specifically for use with the iSi cream whippers and designed for a perfect fit with just the right amount of charge. The N2O gas in these professional chargers provides a 20% higher output than other chargers for more servings per canister, resulting in 20% savings on ingredients and handling without sacrificing the taste of the ingredients.